soo.. Hey guys, haha I've made up my mind, and im going to buy an iMac But i do have some questions: 1.how long do macs normally last, as in over all speed of the system and becoming absolete. i ask this just because of the lack of upgradablity other than the HD and RAM. 2.shud i fork out a bit more cash for the 2.8ghz now, OR w8 for a new revision of the imacs possibly in january(apple expo thing) or febuary or maybe even as late as march. im really excited aobut getting this thing (my parents think its a bad idea going mac, fight the power right? hahahah) any thoughts guys??? or further advice??